20923349 has 2 divisors, whose sum is σ = 20923350. Its totient is φ = 20923348.

The previous prime is 20923337. The next prime is 20923381. The reversal of 20923349 is 94332902.

It is an a-pointer prime, because the next prime (20923381) can be obtained adding 20923349 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16851025 + 4072324 = 4105^2 + 2018^2 .

It is a cyclic number.

It is not a de Polignac number, because 20923349 - 2²⁴ = 4146133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20923649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10461674 + 10461675.

It is an arithmetic number, because the mean of its divisors is an integer number (10461675).

Almost surely, 2^20923349 is an apocalyptic number.

It is an amenable number.

20923349 is a deficient number, since it is larger than the sum of its proper divisors (1).

20923349 is an equidigital number, since it uses as much as digits as its factorization.

20923349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 20923349 is about 4574.2047396241. The cubic root of 20923349 is about 275.5563349125.

The spelling of 20923349 in words is "twenty million, nine hundred twenty-three thousand, three hundred forty-nine".